APA استشهاد

Irvin, G. (1978). Modern cost - benefit methods: An introduction to financial, economic and social appraisal of development projects. Macmillan.

استشهاد بنمط شيكاغو

Irvin, George. Modern Cost - Benefit Methods: An Introduction to Financial, Economic and Social Appraisal of Development Projects. London: Macmillan, 1978.

MLA استشهاد

Irvin, George. Modern Cost - Benefit Methods: An Introduction to Financial, Economic and Social Appraisal of Development Projects. Macmillan, 1978.